Elliptic vibratory part-feeding device

An elliptic vibratory part-feeding device comprising:

• a feeder bowl in which a spiral track is formed;
• a first spring means for supporting said feeder bowl so as to be vibratile in a horizontal direction;
• a first electro-magnet means capable of being driven by an alternating voltage for generating a horizontal vibrating force and exciting said feeder bowl in the horizontal direction;
• a second spring means for supporting said feeder bowl so as to be vibratile in a vertical direction;
• a second electro-magnetic means capable of being driven by an alternating voltage for generating a vertical vibrating force and exciting said feeder bowl in the vertical direction;
• a phase-difference forming means through which voltages different from each other in phase are supplied to said first and second electro-magnet means from alternating electric power source, whereby an elliptical vibrating force is generated as a resultant force from said first and second electro-magnet means;
• a part-jamming detecting means for detecting that said track is blocked by a part or parts to be fed;
• and,
• wherein when part-jamming is detected in said feeder bowl by said part-jamming detecting means, the feeding direction of the parts on said spiral track is reversed by the change-over or adjustment of said phase-difference forming means.